SH 55 over Round Valley Creek
FairValley County, Idaho · 3.6 N. Smiths Ferry · Structure no. 000000000014810
- Built
- 1933
- 92 years old
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Concrete
- Length
- 37 ft
- 1 main span
- Daily traffic
- 4,100
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SH 55 over Round Valley Creek is a concrete tee beam carrying SH 55 over Round Valley Creek in Valley County, Idaho. It was built in 1933, so it is 92 years old, older than the Idaho average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 4,100 vehicles a day, roughly 17% of them trucks, projected to reach 6,150 by 2042. The structure is 37 ft (11.3 m) long and 39 ft wide. If it were closed, the detour would be 6.8 mi (11 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 55 over Round Valley Creek built?
It was built in 1933, making it 92 years old in 2025.
What condition is SH 55 over Round Valley Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.
How much traffic does SH 55 over Round Valley Creek carry?
About 4,100 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is SH 55 over Round Valley Creek?
The structure is 37 ft (11.3 m) long with a longest span of 34 ft (10.4 m) and a deck 39 ft wide.
Who owns SH 55 over Round Valley Creek?
It is owned by the State Highway Agency.